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Commit | Line | Data |
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0f113f3e MC |
1 | /* |
2 | * Written by Richard Levitte (richard@levitte.org) for the OpenSSL project | |
3 | * 2000. | |
8f4fac7f GT |
4 | */ |
5 | /* ==================================================================== | |
6 | * Copyright (c) 2000 The OpenSSL Project. All rights reserved. | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
0f113f3e | 13 | * notice, this list of conditions and the following disclaimer. |
8f4fac7f GT |
14 | * |
15 | * 2. Redistributions in binary form must reproduce the above copyright | |
16 | * notice, this list of conditions and the following disclaimer in | |
17 | * the documentation and/or other materials provided with the | |
18 | * distribution. | |
19 | * | |
20 | * 3. All advertising materials mentioning features or use of this | |
21 | * software must display the following acknowledgment: | |
22 | * "This product includes software developed by the OpenSSL Project | |
23 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | |
24 | * | |
25 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
26 | * endorse or promote products derived from this software without | |
27 | * prior written permission. For written permission, please contact | |
28 | * licensing@OpenSSL.org. | |
29 | * | |
30 | * 5. Products derived from this software may not be called "OpenSSL" | |
31 | * nor may "OpenSSL" appear in their names without prior written | |
32 | * permission of the OpenSSL Project. | |
33 | * | |
34 | * 6. Redistributions of any form whatsoever must retain the following | |
35 | * acknowledgment: | |
36 | * "This product includes software developed by the OpenSSL Project | |
37 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
38 | * | |
39 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
40 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
41 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
42 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
43 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
44 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
45 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
46 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
48 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
49 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
50 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
51 | * ==================================================================== | |
52 | * | |
53 | * This product includes cryptographic software written by Eric Young | |
54 | * (eay@cryptsoft.com). This product includes software written by Tim | |
55 | * Hudson (tjh@cryptsoft.com). | |
56 | * | |
57 | */ | |
58 | ||
59 | #include <stdio.h> | |
b39fc560 | 60 | #include "internal/cryptlib.h" |
8f4fac7f GT |
61 | #include <openssl/dso.h> |
62 | ||
63 | #ifndef DSO_DL | |
64 | DSO_METHOD *DSO_METHOD_dl(void) | |
0f113f3e MC |
65 | { |
66 | return NULL; | |
67 | } | |
8f4fac7f GT |
68 | #else |
69 | ||
0f113f3e | 70 | # include <dl.h> |
8f4fac7f | 71 | |
b9e63915 | 72 | /* Part of the hack in "dl_load" ... */ |
0f113f3e | 73 | # define DSO_MAX_TRANSLATED_SIZE 256 |
b9e63915 | 74 | |
51c8dc37 | 75 | static int dl_load(DSO *dso); |
8f4fac7f | 76 | static int dl_unload(DSO *dso); |
e9a68cfb GT |
77 | static void *dl_bind_var(DSO *dso, const char *symname); |
78 | static DSO_FUNC_TYPE dl_bind_func(DSO *dso, const char *symname); | |
51c8dc37 | 79 | static char *dl_name_converter(DSO *dso, const char *filename); |
0f113f3e MC |
80 | static char *dl_merger(DSO *dso, const char *filespec1, |
81 | const char *filespec2); | |
82 | static int dl_pathbyaddr(void *addr, char *path, int sz); | |
c6cb42e4 | 83 | static void *dl_globallookup(const char *name); |
8f4fac7f GT |
84 | |
85 | static DSO_METHOD dso_meth_dl = { | |
0f113f3e MC |
86 | "OpenSSL 'dl' shared library method", |
87 | dl_load, | |
88 | dl_unload, | |
89 | dl_bind_var, | |
90 | dl_bind_func, | |
0f113f3e MC |
91 | NULL, /* ctrl */ |
92 | dl_name_converter, | |
93 | dl_merger, | |
94 | NULL, /* init */ | |
95 | NULL, /* finish */ | |
96 | dl_pathbyaddr, | |
97 | dl_globallookup | |
98 | }; | |
8f4fac7f GT |
99 | |
100 | DSO_METHOD *DSO_METHOD_dl(void) | |
0f113f3e MC |
101 | { |
102 | return (&dso_meth_dl); | |
103 | } | |
8f4fac7f | 104 | |
0f113f3e MC |
105 | /* |
106 | * For this DSO_METHOD, our meth_data STACK will contain; (i) the handle | |
107 | * (shl_t) returned from shl_load(). NB: I checked on HPUX11 and shl_t is | |
108 | * itself a pointer type so the cast is safe. | |
8f4fac7f GT |
109 | */ |
110 | ||
51c8dc37 | 111 | static int dl_load(DSO *dso) |
0f113f3e MC |
112 | { |
113 | shl_t ptr = NULL; | |
114 | /* | |
115 | * We don't do any fancy retries or anything, just take the method's (or | |
116 | * DSO's if it has the callback set) best translation of the | |
117 | * platform-independent filename and try once with that. | |
118 | */ | |
119 | char *filename = DSO_convert_filename(dso, NULL); | |
8f4fac7f | 120 | |
0f113f3e MC |
121 | if (filename == NULL) { |
122 | DSOerr(DSO_F_DL_LOAD, DSO_R_NO_FILENAME); | |
123 | goto err; | |
124 | } | |
125 | ptr = shl_load(filename, BIND_IMMEDIATE | | |
126 | (dso->flags & DSO_FLAG_NO_NAME_TRANSLATION ? 0 : | |
127 | DYNAMIC_PATH), 0L); | |
128 | if (ptr == NULL) { | |
129 | DSOerr(DSO_F_DL_LOAD, DSO_R_LOAD_FAILED); | |
130 | ERR_add_error_data(4, "filename(", filename, "): ", strerror(errno)); | |
131 | goto err; | |
132 | } | |
133 | if (!sk_push(dso->meth_data, (char *)ptr)) { | |
134 | DSOerr(DSO_F_DL_LOAD, DSO_R_STACK_ERROR); | |
135 | goto err; | |
136 | } | |
137 | /* | |
138 | * Success, stick the converted filename we've loaded under into the DSO | |
139 | * (it also serves as the indicator that we are currently loaded). | |
140 | */ | |
141 | dso->loaded_filename = filename; | |
142 | return (1); | |
143 | err: | |
144 | /* Cleanup! */ | |
b548a1f1 | 145 | OPENSSL_free(filename); |
0f113f3e MC |
146 | if (ptr != NULL) |
147 | shl_unload(ptr); | |
148 | return (0); | |
149 | } | |
8f4fac7f GT |
150 | |
151 | static int dl_unload(DSO *dso) | |
0f113f3e MC |
152 | { |
153 | shl_t ptr; | |
154 | if (dso == NULL) { | |
155 | DSOerr(DSO_F_DL_UNLOAD, ERR_R_PASSED_NULL_PARAMETER); | |
156 | return (0); | |
157 | } | |
158 | if (sk_num(dso->meth_data) < 1) | |
159 | return (1); | |
160 | /* Is this statement legal? */ | |
161 | ptr = (shl_t) sk_pop(dso->meth_data); | |
162 | if (ptr == NULL) { | |
163 | DSOerr(DSO_F_DL_UNLOAD, DSO_R_NULL_HANDLE); | |
164 | /* | |
165 | * Should push the value back onto the stack in case of a retry. | |
166 | */ | |
167 | sk_push(dso->meth_data, (char *)ptr); | |
168 | return (0); | |
169 | } | |
170 | shl_unload(ptr); | |
171 | return (1); | |
172 | } | |
8f4fac7f | 173 | |
e9a68cfb | 174 | static void *dl_bind_var(DSO *dso, const char *symname) |
0f113f3e MC |
175 | { |
176 | shl_t ptr; | |
177 | void *sym; | |
8f4fac7f | 178 | |
0f113f3e MC |
179 | if ((dso == NULL) || (symname == NULL)) { |
180 | DSOerr(DSO_F_DL_BIND_VAR, ERR_R_PASSED_NULL_PARAMETER); | |
181 | return (NULL); | |
182 | } | |
183 | if (sk_num(dso->meth_data) < 1) { | |
184 | DSOerr(DSO_F_DL_BIND_VAR, DSO_R_STACK_ERROR); | |
185 | return (NULL); | |
186 | } | |
187 | ptr = (shl_t) sk_value(dso->meth_data, sk_num(dso->meth_data) - 1); | |
188 | if (ptr == NULL) { | |
189 | DSOerr(DSO_F_DL_BIND_VAR, DSO_R_NULL_HANDLE); | |
190 | return (NULL); | |
191 | } | |
192 | if (shl_findsym(&ptr, symname, TYPE_UNDEFINED, &sym) < 0) { | |
193 | DSOerr(DSO_F_DL_BIND_VAR, DSO_R_SYM_FAILURE); | |
194 | ERR_add_error_data(4, "symname(", symname, "): ", strerror(errno)); | |
195 | return (NULL); | |
196 | } | |
197 | return (sym); | |
198 | } | |
e9a68cfb GT |
199 | |
200 | static DSO_FUNC_TYPE dl_bind_func(DSO *dso, const char *symname) | |
0f113f3e MC |
201 | { |
202 | shl_t ptr; | |
203 | void *sym; | |
e9a68cfb | 204 | |
0f113f3e MC |
205 | if ((dso == NULL) || (symname == NULL)) { |
206 | DSOerr(DSO_F_DL_BIND_FUNC, ERR_R_PASSED_NULL_PARAMETER); | |
207 | return (NULL); | |
208 | } | |
209 | if (sk_num(dso->meth_data) < 1) { | |
210 | DSOerr(DSO_F_DL_BIND_FUNC, DSO_R_STACK_ERROR); | |
211 | return (NULL); | |
212 | } | |
213 | ptr = (shl_t) sk_value(dso->meth_data, sk_num(dso->meth_data) - 1); | |
214 | if (ptr == NULL) { | |
215 | DSOerr(DSO_F_DL_BIND_FUNC, DSO_R_NULL_HANDLE); | |
216 | return (NULL); | |
217 | } | |
218 | if (shl_findsym(&ptr, symname, TYPE_UNDEFINED, &sym) < 0) { | |
219 | DSOerr(DSO_F_DL_BIND_FUNC, DSO_R_SYM_FAILURE); | |
220 | ERR_add_error_data(4, "symname(", symname, "): ", strerror(errno)); | |
221 | return (NULL); | |
222 | } | |
223 | return ((DSO_FUNC_TYPE)sym); | |
224 | } | |
8f4fac7f | 225 | |
cbecb3ac | 226 | static char *dl_merger(DSO *dso, const char *filespec1, const char *filespec2) |
0f113f3e MC |
227 | { |
228 | char *merged; | |
cbecb3ac | 229 | |
0f113f3e MC |
230 | if (!filespec1 && !filespec2) { |
231 | DSOerr(DSO_F_DL_MERGER, ERR_R_PASSED_NULL_PARAMETER); | |
232 | return (NULL); | |
233 | } | |
234 | /* | |
235 | * If the first file specification is a rooted path, it rules. same goes | |
236 | * if the second file specification is missing. | |
237 | */ | |
238 | if (!filespec2 || filespec1[0] == '/') { | |
a89c9a0d | 239 | merged = OPENSSL_strdup(filespec1); |
90945fa3 | 240 | if (merged == NULL) { |
0f113f3e MC |
241 | DSOerr(DSO_F_DL_MERGER, ERR_R_MALLOC_FAILURE); |
242 | return (NULL); | |
243 | } | |
0f113f3e MC |
244 | } |
245 | /* | |
246 | * If the first file specification is missing, the second one rules. | |
247 | */ | |
248 | else if (!filespec1) { | |
a89c9a0d | 249 | merged = OPENSSL_strdup(filespec2); |
90945fa3 | 250 | if (merged == NULL) { |
0f113f3e MC |
251 | DSOerr(DSO_F_DL_MERGER, ERR_R_MALLOC_FAILURE); |
252 | return (NULL); | |
253 | } | |
0f113f3e MC |
254 | } else |
255 | /* | |
256 | * This part isn't as trivial as it looks. It assumes that the | |
257 | * second file specification really is a directory, and makes no | |
258 | * checks whatsoever. Therefore, the result becomes the | |
259 | * concatenation of filespec2 followed by a slash followed by | |
260 | * filespec1. | |
261 | */ | |
262 | { | |
263 | int spec2len, len; | |
cbecb3ac | 264 | |
0f113f3e MC |
265 | spec2len = (filespec2 ? strlen(filespec2) : 0); |
266 | len = spec2len + (filespec1 ? strlen(filespec1) : 0); | |
cbecb3ac | 267 | |
0f113f3e MC |
268 | if (filespec2 && filespec2[spec2len - 1] == '/') { |
269 | spec2len--; | |
270 | len--; | |
271 | } | |
272 | merged = OPENSSL_malloc(len + 2); | |
90945fa3 | 273 | if (merged == NULL) { |
0f113f3e MC |
274 | DSOerr(DSO_F_DL_MERGER, ERR_R_MALLOC_FAILURE); |
275 | return (NULL); | |
276 | } | |
277 | strcpy(merged, filespec2); | |
278 | merged[spec2len] = '/'; | |
279 | strcpy(&merged[spec2len + 1], filespec1); | |
280 | } | |
281 | return (merged); | |
282 | } | |
cbecb3ac | 283 | |
0f113f3e MC |
284 | /* |
285 | * This function is identical to the one in dso_dlfcn.c, but as it is highly | |
286 | * unlikely that both the "dl" *and* "dlfcn" variants are being compiled at | |
287 | * the same time, there's no great duplicating the code. Figuring out an | |
288 | * elegant way to share one copy of the code would be more difficult and | |
289 | * would not leave the implementations independent. | |
290 | */ | |
291 | # if defined(__hpux) | |
551e5990 | 292 | static const char extension[] = ".sl"; |
0f113f3e | 293 | # else |
551e5990 | 294 | static const char extension[] = ".so"; |
0f113f3e | 295 | # endif |
51c8dc37 | 296 | static char *dl_name_converter(DSO *dso, const char *filename) |
0f113f3e MC |
297 | { |
298 | char *translated; | |
299 | int len, rsize, transform; | |
51c8dc37 | 300 | |
0f113f3e MC |
301 | len = strlen(filename); |
302 | rsize = len + 1; | |
303 | transform = (strstr(filename, "/") == NULL); | |
304 | { | |
305 | /* We will convert this to "%s.s?" or "lib%s.s?" */ | |
306 | rsize += strlen(extension); /* The length of ".s?" */ | |
307 | if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0) | |
308 | rsize += 3; /* The length of "lib" */ | |
309 | } | |
310 | translated = OPENSSL_malloc(rsize); | |
311 | if (translated == NULL) { | |
312 | DSOerr(DSO_F_DL_NAME_CONVERTER, DSO_R_NAME_TRANSLATION_FAILED); | |
313 | return (NULL); | |
314 | } | |
315 | if (transform) { | |
316 | if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0) | |
317 | sprintf(translated, "lib%s%s", filename, extension); | |
318 | else | |
319 | sprintf(translated, "%s%s", filename, extension); | |
320 | } else | |
321 | sprintf(translated, "%s", filename); | |
322 | return (translated); | |
323 | } | |
51c8dc37 | 324 | |
0f113f3e MC |
325 | static int dl_pathbyaddr(void *addr, char *path, int sz) |
326 | { | |
327 | struct shl_descriptor inf; | |
328 | int i, len; | |
7ed87653 | 329 | |
0f113f3e MC |
330 | if (addr == NULL) { |
331 | union { | |
332 | int (*f) (void *, char *, int); | |
333 | void *p; | |
334 | } t = { | |
335 | dl_pathbyaddr | |
336 | }; | |
337 | addr = t.p; | |
338 | } | |
7ed87653 | 339 | |
0f113f3e MC |
340 | for (i = -1; shl_get_r(i, &inf) == 0; i++) { |
341 | if (((size_t)addr >= inf.tstart && (size_t)addr < inf.tend) || | |
342 | ((size_t)addr >= inf.dstart && (size_t)addr < inf.dend)) { | |
343 | len = (int)strlen(inf.filename); | |
344 | if (sz <= 0) | |
345 | return len + 1; | |
346 | if (len >= sz) | |
347 | len = sz - 1; | |
348 | memcpy(path, inf.filename, len); | |
349 | path[len++] = 0; | |
350 | return len; | |
351 | } | |
352 | } | |
7ed87653 | 353 | |
0f113f3e MC |
354 | return -1; |
355 | } | |
68b64fb6 | 356 | |
c6cb42e4 | 357 | static void *dl_globallookup(const char *name) |
0f113f3e MC |
358 | { |
359 | void *ret; | |
360 | shl_t h = NULL; | |
68b64fb6 | 361 | |
0f113f3e MC |
362 | return shl_findsym(&h, name, TYPE_UNDEFINED, &ret) ? NULL : ret; |
363 | } | |
364 | #endif /* DSO_DL */ |